Circuit-controlling device for electric ignition systems.



fi. KRATZ. GRGUIT GIONTROLLING DEVICE FOR ELECTRIC IGNITION SYSTEMS. v APPLICATION FILED 00T.26, 19.11.

NITED STATESA PATENT oFF-ion.

it known that I, FRANZ KRA'rz, a subject' of the 'Emperor of Germani', and resi- Improvements in Circuit-Controlling De-l vices for Electric VIgnition Svsteiiis; and l do hereby declare the following to be a full, clear. and exact description of the invenn tion. such as will enable others skilled in the art to which it appertains to malte and use the lsame.

This invention relates to a circuit controlling device. preferably of the piish-biitton type, adapted for use in connection with a certain sci-'stem of apparatus for starting multiple cylinder combustion engines b v the ignition of an ignitible gas remaining in one of the cylinders of the engine. which system is illustrated and described in my copending application for United States Letters Patent Seri-al No. 650,248, filed September 19, 1911. Thatsystem, and the device covered b v the present application, constitute improvements upon a prior system and device in which there is a mechanical interrupter and an ignition coil having a vibrator)T armature. in connection witlra circuit con# trolling device, by means of which it is possible to close the circuit of the primary winding of the ignition coil thro-ugh a path in parallel with a second path likewise adapted to close the primar;7 circuit of the ignition coil, which second path contains and is controlled bv the mechanical interrupter. With such an arrangement, the ignition coil with its vibratori' armature maiv be used for starting ignition by the manipulation of the said circuit closing device, and after the engine is started, ignition is brought. about by the mechanical interrupter. To that end. the said circuit closing device, which of the .push-button type, embodies means whereby .thecomplete depression of the inish-button will open the circuit of the interrupter. The .necessitiY of this become.` apparent when it is considered' that in such an arrangement,' if the engine stops with the mechanical interrupter in such position that the circuit is open at the interrupter, then the completion of the primariY circuit of tlie'igiiition coil through the .second path bv means of the..,t`iicuit controlli' device will have the effect to cause the viliratory armature to operate and sei FRANZ lKnAT.z',j-0E STUTTGART, GERMANY,

-, v. or STUTTGART, GERMANY.

Specification of Letters Patent'.

ASSIGNOR T0 THE-FIRM OFB'OBERT IBOSCH.,

` loiiic'iiii'i CONTROitinTNG DEVICE E'on'EI'.ECTEIC.iioriirciiroii SYSTEMS.

Patented'J'une 3, 1913.

Application filed October 26, 1911. Y Serial No. 658,858.

, up sparks in the proper cylinder; but if the` engine stops with the mechanical interrupter closed, then the current flowing through the primary. winding oftheignitien coilv will draw up its armature and prevent its vibrator)T action, so that in such case.

open, then theaction of theif'ibratory arma- 4 ture is continuous, and as soon as the distribiiter, in its rotation, establishes connec-v tion with the next succeeding Cylinder,

sparking is set up therein and premature ignition may occur. The present invention overcomes this difficulty by providing a doiible-contact in thev interrupter circuit, and controlledlb;v the push-button,r of such a character that the nioveii'ien't. ofV depression of the push-button first opens the interrupter circuit and, in the completely depressed position, closes it again. The result is that if the engine stops with the mechanical interrupter closed, it is possible by depression of'the push-button to open the circuit of the interrupter and bring the vibratorv armature of the ignition coil into action, in the prior system above referred to, but the further depression of the puslr button, which will naturall)r be eifected byv auch a position as to keep the interrupter circuit open long enough to bring about the undesirable premature ignition referred to.

The accompanying drawing illustrates theprcferred forni of the invention, in 'conjunction with a diagrammatic illustration of the remaining paits-of-an ignition system to which it maiv be applied. 4

One terminal of the battery 1 is grounded through the switch si., while'the otheiterminal connected to the primariY winding p of the ignition coil 'Q which has a vibra tor \"armature 3, the circuit of the primary winding being completed through thespring plate S, contacts 11 and 18, mechanical interrupter G, and the ground, the circuit being grounded as usual, on the, engine frame.

lh'e second parallel path for the completion of the' circuitV of the primary winding p includes the spring plate 9 carrying the contact 14, the plunger 13 of the push-button 5, and the engine frame to which the socket 7 of the puslrbutton is electrically connected. The puslrbutton 5 is guided in the stationary socket 7 and its inward movement is opposed by the spring 12. The reduced contact-portion 13 of the push-button passes through an aperture in the spring plate S, and the portion 16 of the plunger, being of larger diameter, is guided in a n appropriate aperture in the bottom of the socket-.7. The spring plate 8 carries a block ofinsulation l() which prevents the pushbutton from coming into .electrical contact with the lspring plate and which is adapted to be engaged and moved b v the undertace of the plunger portion 16 when the pushbutt-on is fully depressed. The vibratory armature 3 is adapted to actuate the spring plate 9 through a hooked piece 21 carried by the armature and insulated from the spring plate 9 by the block of insulation 15. All these parts correspond to the device ot the prior system above referred to, but the present invention differs therefrom :in the addition of the second contact 2O electricallyY connected to the interrupter circuit and cooperating` with the Contact button 1Q on the underside of the spring plate 8.

In order to start the. vibratory armature when the mechanical interruptor is open, the switch et is closed and the push-button 5 is depressed until the contacts 13 and 14.- are brought together. The electric current then flows intermittently in accordance with v the vibration of the armature 3 from the battery 1 through the primary winding y) and the contacts 13 and 14 back to the battent through the socket. 7 and the frame ot' the engine.

ln the event' that the engine is stopped with the mechanical interrupter closed, the vibratory armature will be drawn toward its magnet and away from the end ot the plunger 13, so that a further depression of the push-button will be necessary to put the vibratory armature into operation. This 'further depression carries down the spring plate Sand opens the interrupter circuit at the contacts .l1-18, whereupon the ignition current is generated in the secondary wind ing s of the ignition coil 2, and the spark produced at the appropriate spark plug selected by the distributor 7, as will be readily understood. The natural impulse of the chauffeur will, however, be to further depress the puslrhutton until the. contacts 19 and Q0 engage, thereb)v again completing the circuit oit the mechanical interruptor.

Thereafter the mechanical interrui'iter will assume control of the sparking and premature ignition is entirely avoided ln the event that the .spark rnm'luced by the first depression of the puslrliul'tcn does not ignite the combustible mixture in the cvlinder, it is only necessary lor the chautlieur to rapidly repeat the operation until such ignition does occur. ln no case. luiwovcr, will the push-button remain for more than an instant: in t i: internun'liate position in which the circuit oit thc mcclninical interrupter is opened.

Having thus described my invention. what I claim is:w

1. The combination with an ignition coil having a vihratory armature and a contact.

moved thereby, of a push-button carrying a Contact. member cooperating with the said armature contact, two oppositcly disposed contacts electrically connected together, and a conducting contact-member moving between said oppositely disposed contacts and engaged by the push-button in its movement of depression; substantially and for the purpose described.

Q. flhe combination with an ignition coil having a vibratory armature, of a pushhutton, a spring plate carrying contacts and having an. aperture through which the end ot' said puslrlnitton is adapted to pass, a spring plate vibra ted by the armature ot the ignition coil and carryiiig a contact coperating with the end ot the push-button, a contact. adapted to engage one of the contacts carried h v the first named spring plate when the push button is noty dcl'iressed and a second contact. adapted to engage another contact carried liv the lirst named spring plate when the push-button is depressed.

ln testimony whereof l atlix my signature. in presence oit two witnesses.

FRANZ lill-ATZ.

lllitnesses llinanorn llmvnn'r, PAUL Vlromfunrr. 

